Experimental validation of fast simulation methods in the framework of the SKA telescope project

2012 ◽  
Author(s):  
Christopher Raucy ◽  
Eloy de Lera Acedo ◽  
Christophe Craeye ◽  
David Gonzalez-Ovejero ◽  
Nima Razavi Ghods
Keyword(s):  
Experimental Validation ◽  
Simulation Methods ◽  
Fast Simulation

New Hydraulic System Modelling

2004 ◽  
Vol 10 (10) ◽  
pp. 1493-1515 ◽  
Author(s):  
Friedrich Pfeiffer ◽  
Fredrik Borchsenius
Keyword(s):  
Hydraulic System ◽  
Computational Effort ◽  
System Modelling ◽  
Simulation Methods ◽  
Hydraulic Systems ◽  
Efficient Design ◽  
Fast Simulation ◽  
Stiff Differential Equations ◽  
Unilateral Constraints ◽  
Elastic Couplings

The efficient design of hydraulic systems requires fast simulation methods. In most simulation programs, the hydraulic components are coupled by compressible joints. Since the compressibility of oil is very small, this leads to stiff differential equations. To avoid these difficulties stiff elastic couplings can be replaced by algebraic and, in some cases, unilateral constraints. Examples for hydraulic components with unilateral behavior are check valves, cylinders with stop limits and fluid volumes, in which cavitation can occur. The resulting complementarity equations can be solved with a standard Lemke algorithm. Compared to conventional methods, this leads to a significant reduction of computational effort.

Experimental validation of simulation methods for bi-directional transmission properties at the daylighting performance level

2006 ◽  
Vol 38 (7) ◽  
pp. 878-889 ◽  
Author(s):  
Fawaz Maamari ◽  
Marilyne Andersen ◽  
Jan de Boer ◽  
William L. Carroll ◽  
Dominique Dumortier ◽  
...  
Keyword(s):  
Experimental Validation ◽  
Performance Level ◽  
Simulation Methods ◽  
Transmission Properties ◽  
Directional Transmission

Generic Models of Piezo-Actuators and Experimental Validation for Smart Applications

2010 ◽  
Author(s):  
Abdou-Fadel Boukari ◽  
George Moraru ◽  
Jean-Claude Carmona ◽  
Francois Malburet ◽  
Ali Chaaba ◽  
...  
Keyword(s):  
System Dynamics ◽  
Experimental Validation ◽  
Good Choice ◽  
Current Paper ◽  
Simulation Methods ◽  
Final Model ◽  
Control Loops ◽  
Generic Models

In previous papers, we suggested piezo-actuators models and compared them to existing works with respect to sinusoidal solicitations. The current paper aims to experimentally validate and refine them. For this purpose, the piezo-device is integrated in a well known system. This reveals that the modeling of the whole system requires additional artefact and good choice of simulation methods. Then we study the whole system dynamics in order to check the validity of our models. Thereafter, the final model is reversed in order to elaborate control loops in smart applications.

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